IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.167.28.0/23

network10.167.28.0/23

broadcast10.167.29.255

first host10.167.28.1

last host10.167.29.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.28.0/23

address00001010.10100111.00011100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.00011100.00000000

broadcast00001010.10100111.00011101.11111111

green = network part, grey = host part

hex0x0aa71c00

decimal178723840

reverse dns0.28.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:1c00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.28.0/31	10.167.28.0 – 10.167.28.1	10.167.28.1
2	10.167.28.2/31	10.167.28.2 – 10.167.28.3	10.167.28.3
3	10.167.28.4/31	10.167.28.4 – 10.167.28.5	10.167.28.5
4	10.167.28.6/31	10.167.28.6 – 10.167.28.7	10.167.28.7
5	10.167.28.8/31	10.167.28.8 – 10.167.28.9	10.167.28.9
6	10.167.28.10/31	10.167.28.10 – 10.167.28.11	10.167.28.11
7	10.167.28.12/31	10.167.28.12 – 10.167.28.13	10.167.28.13
8	10.167.28.14/31	10.167.28.14 – 10.167.28.15	10.167.28.15
9	10.167.28.16/31	10.167.28.16 – 10.167.28.17	10.167.28.17
10	10.167.28.18/31	10.167.28.18 – 10.167.28.19	10.167.28.19
11	10.167.28.20/31	10.167.28.20 – 10.167.28.21	10.167.28.21
12	10.167.28.22/31	10.167.28.22 – 10.167.28.23	10.167.28.23
13	10.167.28.24/31	10.167.28.24 – 10.167.28.25	10.167.28.25
14	10.167.28.26/31	10.167.28.26 – 10.167.28.27	10.167.28.27
15	10.167.28.28/31	10.167.28.28 – 10.167.28.29	10.167.28.29
16	10.167.28.30/31	10.167.28.30 – 10.167.28.31	10.167.28.31
17	10.167.28.32/31	10.167.28.32 – 10.167.28.33	10.167.28.33
18	10.167.28.34/31	10.167.28.34 – 10.167.28.35	10.167.28.35
19	10.167.28.36/31	10.167.28.36 – 10.167.28.37	10.167.28.37
20	10.167.28.38/31	10.167.28.38 – 10.167.28.39	10.167.28.39
21	10.167.28.40/31	10.167.28.40 – 10.167.28.41	10.167.28.41
22	10.167.28.42/31	10.167.28.42 – 10.167.28.43	10.167.28.43
23	10.167.28.44/31	10.167.28.44 – 10.167.28.45	10.167.28.45
24	10.167.28.46/31	10.167.28.46 – 10.167.28.47	10.167.28.47
25	10.167.28.48/31	10.167.28.48 – 10.167.28.49	10.167.28.49
26	10.167.28.50/31	10.167.28.50 – 10.167.28.51	10.167.28.51
27	10.167.28.52/31	10.167.28.52 – 10.167.28.53	10.167.28.53
28	10.167.28.54/31	10.167.28.54 – 10.167.28.55	10.167.28.55
29	10.167.28.56/31	10.167.28.56 – 10.167.28.57	10.167.28.57
30	10.167.28.58/31	10.167.28.58 – 10.167.28.59	10.167.28.59
31	10.167.28.60/31	10.167.28.60 – 10.167.28.61	10.167.28.61
32	10.167.28.62/31	10.167.28.62 – 10.167.28.63	10.167.28.63
33	10.167.28.64/31	10.167.28.64 – 10.167.28.65	10.167.28.65
34	10.167.28.66/31	10.167.28.66 – 10.167.28.67	10.167.28.67
35	10.167.28.68/31	10.167.28.68 – 10.167.28.69	10.167.28.69
36	10.167.28.70/31	10.167.28.70 – 10.167.28.71	10.167.28.71
37	10.167.28.72/31	10.167.28.72 – 10.167.28.73	10.167.28.73
38	10.167.28.74/31	10.167.28.74 – 10.167.28.75	10.167.28.75
39	10.167.28.76/31	10.167.28.76 – 10.167.28.77	10.167.28.77
40	10.167.28.78/31	10.167.28.78 – 10.167.28.79	10.167.28.79
41	10.167.28.80/31	10.167.28.80 – 10.167.28.81	10.167.28.81
42	10.167.28.82/31	10.167.28.82 – 10.167.28.83	10.167.28.83
43	10.167.28.84/31	10.167.28.84 – 10.167.28.85	10.167.28.85
44	10.167.28.86/31	10.167.28.86 – 10.167.28.87	10.167.28.87
45	10.167.28.88/31	10.167.28.88 – 10.167.28.89	10.167.28.89
46	10.167.28.90/31	10.167.28.90 – 10.167.28.91	10.167.28.91
47	10.167.28.92/31	10.167.28.92 – 10.167.28.93	10.167.28.93
48	10.167.28.94/31	10.167.28.94 – 10.167.28.95	10.167.28.95
49	10.167.28.96/31	10.167.28.96 – 10.167.28.97	10.167.28.97
50	10.167.28.98/31	10.167.28.98 – 10.167.28.99	10.167.28.99
51	10.167.28.100/31	10.167.28.100 – 10.167.28.101	10.167.28.101
52	10.167.28.102/31	10.167.28.102 – 10.167.28.103	10.167.28.103
53	10.167.28.104/31	10.167.28.104 – 10.167.28.105	10.167.28.105
54	10.167.28.106/31	10.167.28.106 – 10.167.28.107	10.167.28.107
55	10.167.28.108/31	10.167.28.108 – 10.167.28.109	10.167.28.109
56	10.167.28.110/31	10.167.28.110 – 10.167.28.111	10.167.28.111
57	10.167.28.112/31	10.167.28.112 – 10.167.28.113	10.167.28.113
58	10.167.28.114/31	10.167.28.114 – 10.167.28.115	10.167.28.115
59	10.167.28.116/31	10.167.28.116 – 10.167.28.117	10.167.28.117
60	10.167.28.118/31	10.167.28.118 – 10.167.28.119	10.167.28.119
61	10.167.28.120/31	10.167.28.120 – 10.167.28.121	10.167.28.121
62	10.167.28.122/31	10.167.28.122 – 10.167.28.123	10.167.28.123
63	10.167.28.124/31	10.167.28.124 – 10.167.28.125	10.167.28.125
64	10.167.28.126/31	10.167.28.126 – 10.167.28.127	10.167.28.127
65	10.167.28.128/31	10.167.28.128 – 10.167.28.129	10.167.28.129
66	10.167.28.130/31	10.167.28.130 – 10.167.28.131	10.167.28.131
67	10.167.28.132/31	10.167.28.132 – 10.167.28.133	10.167.28.133
68	10.167.28.134/31	10.167.28.134 – 10.167.28.135	10.167.28.135
69	10.167.28.136/31	10.167.28.136 – 10.167.28.137	10.167.28.137
70	10.167.28.138/31	10.167.28.138 – 10.167.28.139	10.167.28.139
71	10.167.28.140/31	10.167.28.140 – 10.167.28.141	10.167.28.141
72	10.167.28.142/31	10.167.28.142 – 10.167.28.143	10.167.28.143
73	10.167.28.144/31	10.167.28.144 – 10.167.28.145	10.167.28.145
74	10.167.28.146/31	10.167.28.146 – 10.167.28.147	10.167.28.147
75	10.167.28.148/31	10.167.28.148 – 10.167.28.149	10.167.28.149
76	10.167.28.150/31	10.167.28.150 – 10.167.28.151	10.167.28.151
77	10.167.28.152/31	10.167.28.152 – 10.167.28.153	10.167.28.153
78	10.167.28.154/31	10.167.28.154 – 10.167.28.155	10.167.28.155
79	10.167.28.156/31	10.167.28.156 – 10.167.28.157	10.167.28.157
80	10.167.28.158/31	10.167.28.158 – 10.167.28.159	10.167.28.159
81	10.167.28.160/31	10.167.28.160 – 10.167.28.161	10.167.28.161
82	10.167.28.162/31	10.167.28.162 – 10.167.28.163	10.167.28.163
83	10.167.28.164/31	10.167.28.164 – 10.167.28.165	10.167.28.165
84	10.167.28.166/31	10.167.28.166 – 10.167.28.167	10.167.28.167
85	10.167.28.168/31	10.167.28.168 – 10.167.28.169	10.167.28.169
86	10.167.28.170/31	10.167.28.170 – 10.167.28.171	10.167.28.171
87	10.167.28.172/31	10.167.28.172 – 10.167.28.173	10.167.28.173
88	10.167.28.174/31	10.167.28.174 – 10.167.28.175	10.167.28.175
89	10.167.28.176/31	10.167.28.176 – 10.167.28.177	10.167.28.177
90	10.167.28.178/31	10.167.28.178 – 10.167.28.179	10.167.28.179
91	10.167.28.180/31	10.167.28.180 – 10.167.28.181	10.167.28.181
92	10.167.28.182/31	10.167.28.182 – 10.167.28.183	10.167.28.183
93	10.167.28.184/31	10.167.28.184 – 10.167.28.185	10.167.28.185
94	10.167.28.186/31	10.167.28.186 – 10.167.28.187	10.167.28.187
95	10.167.28.188/31	10.167.28.188 – 10.167.28.189	10.167.28.189
96	10.167.28.190/31	10.167.28.190 – 10.167.28.191	10.167.28.191
97	10.167.28.192/31	10.167.28.192 – 10.167.28.193	10.167.28.193
98	10.167.28.194/31	10.167.28.194 – 10.167.28.195	10.167.28.195
99	10.167.28.196/31	10.167.28.196 – 10.167.28.197	10.167.28.197
100	10.167.28.198/31	10.167.28.198 – 10.167.28.199	10.167.28.199
101	10.167.28.200/31	10.167.28.200 – 10.167.28.201	10.167.28.201
102	10.167.28.202/31	10.167.28.202 – 10.167.28.203	10.167.28.203
103	10.167.28.204/31	10.167.28.204 – 10.167.28.205	10.167.28.205
104	10.167.28.206/31	10.167.28.206 – 10.167.28.207	10.167.28.207
105	10.167.28.208/31	10.167.28.208 – 10.167.28.209	10.167.28.209
106	10.167.28.210/31	10.167.28.210 – 10.167.28.211	10.167.28.211
107	10.167.28.212/31	10.167.28.212 – 10.167.28.213	10.167.28.213
108	10.167.28.214/31	10.167.28.214 – 10.167.28.215	10.167.28.215
109	10.167.28.216/31	10.167.28.216 – 10.167.28.217	10.167.28.217
110	10.167.28.218/31	10.167.28.218 – 10.167.28.219	10.167.28.219
111	10.167.28.220/31	10.167.28.220 – 10.167.28.221	10.167.28.221
112	10.167.28.222/31	10.167.28.222 – 10.167.28.223	10.167.28.223
113	10.167.28.224/31	10.167.28.224 – 10.167.28.225	10.167.28.225
114	10.167.28.226/31	10.167.28.226 – 10.167.28.227	10.167.28.227
115	10.167.28.228/31	10.167.28.228 – 10.167.28.229	10.167.28.229
116	10.167.28.230/31	10.167.28.230 – 10.167.28.231	10.167.28.231
117	10.167.28.232/31	10.167.28.232 – 10.167.28.233	10.167.28.233
118	10.167.28.234/31	10.167.28.234 – 10.167.28.235	10.167.28.235
119	10.167.28.236/31	10.167.28.236 – 10.167.28.237	10.167.28.237
120	10.167.28.238/31	10.167.28.238 – 10.167.28.239	10.167.28.239
121	10.167.28.240/31	10.167.28.240 – 10.167.28.241	10.167.28.241
122	10.167.28.242/31	10.167.28.242 – 10.167.28.243	10.167.28.243
123	10.167.28.244/31	10.167.28.244 – 10.167.28.245	10.167.28.245
124	10.167.28.246/31	10.167.28.246 – 10.167.28.247	10.167.28.247
125	10.167.28.248/31	10.167.28.248 – 10.167.28.249	10.167.28.249
126	10.167.28.250/31	10.167.28.250 – 10.167.28.251	10.167.28.251
127	10.167.28.252/31	10.167.28.252 – 10.167.28.253	10.167.28.253
128	10.167.28.254/31	10.167.28.254 – 10.167.28.255	10.167.28.255
129	10.167.29.0/31	10.167.29.0 – 10.167.29.1	10.167.29.1
130	10.167.29.2/31	10.167.29.2 – 10.167.29.3	10.167.29.3
131	10.167.29.4/31	10.167.29.4 – 10.167.29.5	10.167.29.5
132	10.167.29.6/31	10.167.29.6 – 10.167.29.7	10.167.29.7
133	10.167.29.8/31	10.167.29.8 – 10.167.29.9	10.167.29.9
134	10.167.29.10/31	10.167.29.10 – 10.167.29.11	10.167.29.11
135	10.167.29.12/31	10.167.29.12 – 10.167.29.13	10.167.29.13
136	10.167.29.14/31	10.167.29.14 – 10.167.29.15	10.167.29.15
137	10.167.29.16/31	10.167.29.16 – 10.167.29.17	10.167.29.17
138	10.167.29.18/31	10.167.29.18 – 10.167.29.19	10.167.29.19
139	10.167.29.20/31	10.167.29.20 – 10.167.29.21	10.167.29.21
140	10.167.29.22/31	10.167.29.22 – 10.167.29.23	10.167.29.23
141	10.167.29.24/31	10.167.29.24 – 10.167.29.25	10.167.29.25
142	10.167.29.26/31	10.167.29.26 – 10.167.29.27	10.167.29.27
143	10.167.29.28/31	10.167.29.28 – 10.167.29.29	10.167.29.29
144	10.167.29.30/31	10.167.29.30 – 10.167.29.31	10.167.29.31
145	10.167.29.32/31	10.167.29.32 – 10.167.29.33	10.167.29.33
146	10.167.29.34/31	10.167.29.34 – 10.167.29.35	10.167.29.35
147	10.167.29.36/31	10.167.29.36 – 10.167.29.37	10.167.29.37
148	10.167.29.38/31	10.167.29.38 – 10.167.29.39	10.167.29.39
149	10.167.29.40/31	10.167.29.40 – 10.167.29.41	10.167.29.41
150	10.167.29.42/31	10.167.29.42 – 10.167.29.43	10.167.29.43
151	10.167.29.44/31	10.167.29.44 – 10.167.29.45	10.167.29.45
152	10.167.29.46/31	10.167.29.46 – 10.167.29.47	10.167.29.47
153	10.167.29.48/31	10.167.29.48 – 10.167.29.49	10.167.29.49
154	10.167.29.50/31	10.167.29.50 – 10.167.29.51	10.167.29.51
155	10.167.29.52/31	10.167.29.52 – 10.167.29.53	10.167.29.53
156	10.167.29.54/31	10.167.29.54 – 10.167.29.55	10.167.29.55
157	10.167.29.56/31	10.167.29.56 – 10.167.29.57	10.167.29.57
158	10.167.29.58/31	10.167.29.58 – 10.167.29.59	10.167.29.59
159	10.167.29.60/31	10.167.29.60 – 10.167.29.61	10.167.29.61
160	10.167.29.62/31	10.167.29.62 – 10.167.29.63	10.167.29.63
161	10.167.29.64/31	10.167.29.64 – 10.167.29.65	10.167.29.65
162	10.167.29.66/31	10.167.29.66 – 10.167.29.67	10.167.29.67
163	10.167.29.68/31	10.167.29.68 – 10.167.29.69	10.167.29.69
164	10.167.29.70/31	10.167.29.70 – 10.167.29.71	10.167.29.71
165	10.167.29.72/31	10.167.29.72 – 10.167.29.73	10.167.29.73
166	10.167.29.74/31	10.167.29.74 – 10.167.29.75	10.167.29.75
167	10.167.29.76/31	10.167.29.76 – 10.167.29.77	10.167.29.77
168	10.167.29.78/31	10.167.29.78 – 10.167.29.79	10.167.29.79
169	10.167.29.80/31	10.167.29.80 – 10.167.29.81	10.167.29.81
170	10.167.29.82/31	10.167.29.82 – 10.167.29.83	10.167.29.83
171	10.167.29.84/31	10.167.29.84 – 10.167.29.85	10.167.29.85
172	10.167.29.86/31	10.167.29.86 – 10.167.29.87	10.167.29.87
173	10.167.29.88/31	10.167.29.88 – 10.167.29.89	10.167.29.89
174	10.167.29.90/31	10.167.29.90 – 10.167.29.91	10.167.29.91
175	10.167.29.92/31	10.167.29.92 – 10.167.29.93	10.167.29.93
176	10.167.29.94/31	10.167.29.94 – 10.167.29.95	10.167.29.95
177	10.167.29.96/31	10.167.29.96 – 10.167.29.97	10.167.29.97
178	10.167.29.98/31	10.167.29.98 – 10.167.29.99	10.167.29.99
179	10.167.29.100/31	10.167.29.100 – 10.167.29.101	10.167.29.101
180	10.167.29.102/31	10.167.29.102 – 10.167.29.103	10.167.29.103
181	10.167.29.104/31	10.167.29.104 – 10.167.29.105	10.167.29.105
182	10.167.29.106/31	10.167.29.106 – 10.167.29.107	10.167.29.107
183	10.167.29.108/31	10.167.29.108 – 10.167.29.109	10.167.29.109
184	10.167.29.110/31	10.167.29.110 – 10.167.29.111	10.167.29.111
185	10.167.29.112/31	10.167.29.112 – 10.167.29.113	10.167.29.113
186	10.167.29.114/31	10.167.29.114 – 10.167.29.115	10.167.29.115
187	10.167.29.116/31	10.167.29.116 – 10.167.29.117	10.167.29.117
188	10.167.29.118/31	10.167.29.118 – 10.167.29.119	10.167.29.119
189	10.167.29.120/31	10.167.29.120 – 10.167.29.121	10.167.29.121
190	10.167.29.122/31	10.167.29.122 – 10.167.29.123	10.167.29.123
191	10.167.29.124/31	10.167.29.124 – 10.167.29.125	10.167.29.125
192	10.167.29.126/31	10.167.29.126 – 10.167.29.127	10.167.29.127
193	10.167.29.128/31	10.167.29.128 – 10.167.29.129	10.167.29.129
194	10.167.29.130/31	10.167.29.130 – 10.167.29.131	10.167.29.131
195	10.167.29.132/31	10.167.29.132 – 10.167.29.133	10.167.29.133
196	10.167.29.134/31	10.167.29.134 – 10.167.29.135	10.167.29.135
197	10.167.29.136/31	10.167.29.136 – 10.167.29.137	10.167.29.137
198	10.167.29.138/31	10.167.29.138 – 10.167.29.139	10.167.29.139
199	10.167.29.140/31	10.167.29.140 – 10.167.29.141	10.167.29.141
200	10.167.29.142/31	10.167.29.142 – 10.167.29.143	10.167.29.143
201	10.167.29.144/31	10.167.29.144 – 10.167.29.145	10.167.29.145
202	10.167.29.146/31	10.167.29.146 – 10.167.29.147	10.167.29.147
203	10.167.29.148/31	10.167.29.148 – 10.167.29.149	10.167.29.149
204	10.167.29.150/31	10.167.29.150 – 10.167.29.151	10.167.29.151
205	10.167.29.152/31	10.167.29.152 – 10.167.29.153	10.167.29.153
206	10.167.29.154/31	10.167.29.154 – 10.167.29.155	10.167.29.155
207	10.167.29.156/31	10.167.29.156 – 10.167.29.157	10.167.29.157
208	10.167.29.158/31	10.167.29.158 – 10.167.29.159	10.167.29.159
209	10.167.29.160/31	10.167.29.160 – 10.167.29.161	10.167.29.161
210	10.167.29.162/31	10.167.29.162 – 10.167.29.163	10.167.29.163
211	10.167.29.164/31	10.167.29.164 – 10.167.29.165	10.167.29.165
212	10.167.29.166/31	10.167.29.166 – 10.167.29.167	10.167.29.167
213	10.167.29.168/31	10.167.29.168 – 10.167.29.169	10.167.29.169
214	10.167.29.170/31	10.167.29.170 – 10.167.29.171	10.167.29.171
215	10.167.29.172/31	10.167.29.172 – 10.167.29.173	10.167.29.173
216	10.167.29.174/31	10.167.29.174 – 10.167.29.175	10.167.29.175
217	10.167.29.176/31	10.167.29.176 – 10.167.29.177	10.167.29.177
218	10.167.29.178/31	10.167.29.178 – 10.167.29.179	10.167.29.179
219	10.167.29.180/31	10.167.29.180 – 10.167.29.181	10.167.29.181
220	10.167.29.182/31	10.167.29.182 – 10.167.29.183	10.167.29.183
221	10.167.29.184/31	10.167.29.184 – 10.167.29.185	10.167.29.185
222	10.167.29.186/31	10.167.29.186 – 10.167.29.187	10.167.29.187
223	10.167.29.188/31	10.167.29.188 – 10.167.29.189	10.167.29.189
224	10.167.29.190/31	10.167.29.190 – 10.167.29.191	10.167.29.191
225	10.167.29.192/31	10.167.29.192 – 10.167.29.193	10.167.29.193
226	10.167.29.194/31	10.167.29.194 – 10.167.29.195	10.167.29.195
227	10.167.29.196/31	10.167.29.196 – 10.167.29.197	10.167.29.197
228	10.167.29.198/31	10.167.29.198 – 10.167.29.199	10.167.29.199
229	10.167.29.200/31	10.167.29.200 – 10.167.29.201	10.167.29.201
230	10.167.29.202/31	10.167.29.202 – 10.167.29.203	10.167.29.203
231	10.167.29.204/31	10.167.29.204 – 10.167.29.205	10.167.29.205
232	10.167.29.206/31	10.167.29.206 – 10.167.29.207	10.167.29.207
233	10.167.29.208/31	10.167.29.208 – 10.167.29.209	10.167.29.209
234	10.167.29.210/31	10.167.29.210 – 10.167.29.211	10.167.29.211
235	10.167.29.212/31	10.167.29.212 – 10.167.29.213	10.167.29.213
236	10.167.29.214/31	10.167.29.214 – 10.167.29.215	10.167.29.215
237	10.167.29.216/31	10.167.29.216 – 10.167.29.217	10.167.29.217
238	10.167.29.218/31	10.167.29.218 – 10.167.29.219	10.167.29.219
239	10.167.29.220/31	10.167.29.220 – 10.167.29.221	10.167.29.221
240	10.167.29.222/31	10.167.29.222 – 10.167.29.223	10.167.29.223
241	10.167.29.224/31	10.167.29.224 – 10.167.29.225	10.167.29.225
242	10.167.29.226/31	10.167.29.226 – 10.167.29.227	10.167.29.227
243	10.167.29.228/31	10.167.29.228 – 10.167.29.229	10.167.29.229
244	10.167.29.230/31	10.167.29.230 – 10.167.29.231	10.167.29.231
245	10.167.29.232/31	10.167.29.232 – 10.167.29.233	10.167.29.233
246	10.167.29.234/31	10.167.29.234 – 10.167.29.235	10.167.29.235
247	10.167.29.236/31	10.167.29.236 – 10.167.29.237	10.167.29.237
248	10.167.29.238/31	10.167.29.238 – 10.167.29.239	10.167.29.239
249	10.167.29.240/31	10.167.29.240 – 10.167.29.241	10.167.29.241
250	10.167.29.242/31	10.167.29.242 – 10.167.29.243	10.167.29.243
251	10.167.29.244/31	10.167.29.244 – 10.167.29.245	10.167.29.245
252	10.167.29.246/31	10.167.29.246 – 10.167.29.247	10.167.29.247
253	10.167.29.248/31	10.167.29.248 – 10.167.29.249	10.167.29.249
254	10.167.29.250/31	10.167.29.250 – 10.167.29.251	10.167.29.251
255	10.167.29.252/31	10.167.29.252 – 10.167.29.253	10.167.29.253
256	10.167.29.254/31	10.167.29.254 – 10.167.29.255	10.167.29.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /23
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →